This approach involves supporting Tier 1 backlinks by creating a link pyramid of backlinks.
Instead of sending low-quality links straight at your main website, tiered strategies build links to your supporting content at the top layer, which in turn pushes link juice to your primary target.
This is read more an intelligent way to stay safe while still gaining off-page benefits.
If you're interested in this method, check out this Tier 1 post
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